812
FXUS66 KPQR 230436
AFDPQR
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PORTLAND OR
936 PM PDT SAT AUG 22 2026
SYNOPSIS
LOW PRESSURE MOVING OVER THE AREA WILL SEND A WEAK
COLD FRONT THROUGH THE AREA TONIGHT. EXPECT NEAR AVERAGE DAYTIME
HIGHS THROUGH THE WEEK. RIDGING BUILDS BACK INTO THE AREA EARLY
NEXT WEEK, INCREASING TEMPERATURES BACK INTO THE MID TO UPPER
80S ACROSS THE INTERIOR LOWLANDS.
DISCUSSION...TONIGHT THROUGH FRIDAY
AN UPPER LEVEL TROUGH
WILL CONTINUE TO PROGRESS NORTHEAST TONIGHT, SENDING A WEAK
COLD FRONT THROUGH THE AREA. AS THE LOW MOVES FURTHER INLAND,
ZONAL FLOW ALOFT WILL DEVELOP ON SUNDAY. ZONAL FLOW WILL
MAINTAIN SEASONAL TEMPERATURES ACROSS THE FORECAST AREA. LOOKING
AHEAD THROUGH THE EARLY NEXT WEEK, ENSEMBLE CLUSTERS FAVOR
RIDGING OVER THE CENTRAL CONUS WHICH WILL SPREAD INTO THE PACNW.
AS THE RIDGE BUILDS OVER THE AREA, WARMER TEMPERATURE ARE
EXPECTED TO RETURN MONDAY AND TUESDAY. THERE REMAINS SOME
UNCERTAINLY AS TO HOW WARM THE START OF NEXT WEEK WILL BE AS THE
10TH-90TH PERCENTILES FOR DAYTIME HIGHS RANGE FROM THE MID 80S
TO LOW 90S FOR THE INTERIOR LOWLANDS ON MONDAY AND TUESDAY.
CLUSTERS FAVOR ANOTHER TROUGH INFLUENCING THE REGION BY MID-WEEK
BUT EXACT TIMING AND UPPER LEVEL PATTERN ARE UNCERTAIN BUT
ONSHORE FLOW AND SEASONABLE OR BELOW AVERAGE TEMPERATURES WOULD
BE FAVORED. WHEN LOOKING AT WEDNESDAY AND THURSDAY, THE
10TH-90TH PERCENTILES RANGE FROM THE LOW 70S TO LOW 80S. THERE
IS ALSO NO CLEAR SIGNAL FOR ANY PRECIPITATION ASSOCIATED WITH
THE MID WEEK TROUGH. APPROXIMATELY 15-25% OF MEMBERS SHOW VERY
LIGHT RAIN POSSIBLE DURING THE THURSDAY-FRIDAY TIMEFRAME BUT
NOTHING SIGNIFICANT AT THIS TIME. /42-19
AVIATION...06Z TAFS
AN UPPER-LEVEL LOW CONTINUES TO SLOWLY
MOVE NORTH/NORTHEAST TONIGHT. CURRENT OBSERVATIONS HAVE VFR
CONDITIONS INLAND WITH VFR TO IFR CONDITIONS ALONG THE COAST.
OVERALL FLIGHT CONDITIONS ARE EXPECTED TO LOWER THROUGH THE NEXT
FEW HOURS, WITH IFR/LIFR CONDITIONS ALONG THE COAST AND MVFR
CONDITIONS FOR ALL INLAND LOCATIONS. FLIGHT CONDITIONS EXPECTED TO
IMPROVE STARTING AROUND 18Z-20Z SUNDAY, WITH VFR CONDITIONS
EXPECTED FOR INLAND LOCATIONS AND IFR/MVFR CONDITIONS ALONG THE
COAST, WITH BRIEF PERIODS OF VFR POSSIBLE FROM 18Z SUNDAY THROUGH
02Z MONDAY.
SOUTH/SOUTHWEST WINDS WILL CONTINUE THROUGH AT LEAST 17Z-19Z
SUNDAY, AFTERWARDS EXPECT NORTHERLY WINDS ACROSS THE AIRSPACE.
NORTHERLY GUSTS APPROACHING 25 KT EXPECTED ALONG THE COAST
STARTING AROUND 18Z SUNDAY AND WILL PERSIST THROUGH THE REMAINDER
OF THE TAF PERIOD.
KPDX AND APPROACHES...VFR CONDITIONS WILL LOWER TOWARDS MVFR OVER
THE NEXT FEW HOURS. SOUTHERLY WINDS EXPECTED TO PERSIST THROUGH
AROUND 18Z-20Z SUNDAY, WITH NORTHERLY WINDS RETURNING AFTERWARDS.
VFR CONDITIONS ARE ALSO EXPECTED TO RETURN AROUND THE SAME TIME
PERIOD. THESE CONDITIONS EXPECTED TO PERSIST THROUGH THE REMAINDER
OF THE TAF PERIOD. /42
MARINE
SOUTH TO SOUTHWEST WINDS CONTINUE THROUGH TONIGHT AS
A LOW PRESSURE SYSTEM MOVES OVER THE NORTHEAST PACIFIC. HIGH
PRESSURE AND NORTHERLY WINDS RETURN BY SUNDAY, WITH A 40-70%
CHANCE FOR NORTHERLY WIND GUSTS UP TO 25 KT IN THE EVENING AND
CONTINUING INTO MONDAY. SEAS OF 4-6 FT PERSIST THROUGH THE
PERIOD. /42
PQR WATCHES/WARNINGS/ADVISORIES
OR...NONE.
WA...NONE.
PZ...NONE.
WWW.WEATHER.GOV/PORTLAND
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